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Finding the Fourth Proportional to 85,364.65, 128,066.10 and 26,206.30

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Solution

The fourth proportional to 85,364.65, 128,066.10 and 26,206.30 is: 39,315.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.65 : 128,066.10 = 26,206.30 : x
  2. Step 2: Convert to fraction form
    85,364.65/128,066.10 = 26,206.30/x
  3. Step 3: Cross multiply
    85,364.65x = 128,066.10 × 26,206.30
  4. Step 4: Simplify right side
    85,364.65x = 3,356,138,636.43
  5. Step 5: Solve for x
    x = 3,356,138,636.43/85,364.65
  6. Step 6: Final answer
    x = 39,315.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.